:root {
    --button: #b3b3b3;
    --button-color: #0a0a0a;
    --shadow: #000;
    --bg: #737373;
    --header: #7a7a7a;
    --color: #fafafa;
    --lit-header: #e6e6e6;
    --speed: 2s;
}

@property --swing-x {
    initial-value: 0;
    inherits: false;
    syntax: '<integer>';
}

@property --swing-y {
    initial-value: 0;
    inherits: false;
    syntax: '<integer>';
}


.NotPageA01 {
    width: 100vw;
    height: 100vh;
    box-sizing: border-box;
    transform-style: preserve-3d;
    background-color: #1F1F1F;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    font-family: 'Roboto', sans-serif;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    color: var(--color);
    perspective: 1200px;
}


h1 {
    -webkit-animation: swing var(--speed) infinite alternate ease-in-out;
    animation: swing var(--speed) infinite alternate ease-in-out;
    font-size: clamp(5rem, 40vmin, 20rem);
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    margin-bottom: 1rem;
    letter-spacing: 1rem;
    transform: translate3d(0, 0, 0vmin);
    --x: calc(50% + (var(--swing-x) * 0.5) * 1%);
    background: radial-gradient(var(--lit-header), var(--header) 45%) var(--x) 100%/200% 200%;
    background-clip: text;
    color: transparent;
}

h1:after {
    -webkit-animation: swing var(--speed) infinite alternate ease-in-out;
    animation: swing var(--speed) infinite alternate ease-in-out;
    content: "404";
    position: absolute;
    top: 0;
    left: 0;
    color: var(--shadow);
    filter: blur(1.5vmin);
    transform: scale(1.05) translate3d(0, 12%, -10vmin) translate(calc((var(--swing-x, 0) * 0.05) * 1%), calc((var(--swing-y) * 0.05) * 1%));
}

.cloak {
    animation: swing var(--speed) infinite alternate-reverse ease-in-out;
    height: 100%;
    width: 100%;
    transform-origin: 50% 30%;
    transform: rotate(calc(var(--swing-x) * -0.25deg));
    background: radial-gradient(40% 40% at 50% 42%, transparent, #000 35%);
}

.cloak__wrapper {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    overflow: hidden;
}

.cloak__container {
    height: 250vmax;
    width: 250vmax;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.info {
    text-align: center;
    line-height: 1.5;
    max-width: clamp(16rem, 90vmin, 25rem);
}

.info>p {
    margin-bottom: 3rem;
}

@-webkit-keyframes swing {
    0% {
        --swing-x: -100;
        --swing-y: -100;
    }

    50% {
        --swing-y: 0;
    }

    100% {
        --swing-y: -100;
        --swing-x: 100;
    }
}

@keyframes swing {
    0% {
        --swing-x: -100;
        --swing-y: -100;
    }

    50% {
        --swing-y: 0;
    }

    100% {
        --swing-y: -100;
        --swing-x: 100;
    }
}